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Fix infinity point assertion failure in secp256k1_dleq_verify #337

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Fix infinity point assertion failure in secp256k1_dleq_verify #337

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Copilot Mar 3, 2026
f63b512
Fix assertion failure in secp256k1_dleq_verify when computed R points…
Copilot Mar 3, 2026
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4 changes: 4 additions & 0 deletions src/modules/ecdsa_adaptor/dleq_impl.h
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Expand Up @@ -147,6 +147,10 @@ static int secp256k1_dleq_verify(const secp256k1_scalar *s, const secp256k1_scal

secp256k1_ge_set_all_gej_var(r, rj, 2);

if (secp256k1_ge_is_infinity(&r[0]) || secp256k1_ge_is_infinity(&r[1])) {
return 0;
}

secp256k1_dleq_challenge(&e_expected, gen2, &r[0], &r[1], p1, p2);

secp256k1_scalar_add(&e_expected, &e_expected, &e_neg);
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